<template>
  <div id="root">
    <div class="todo-container">
      <div class="todo-wrap">
        <UserHeader :receive="receive"/>
        <UserList
            :todos="todos"
            :checkTodo="checkTodo"
            :deleteTodo="deleteTodo"
        />
        <UserFooter :todos="todos"
                    :checkAllTodo="checkAllTodo"
                    :clearCompletedTodo="clearCompletedTodo"
        />
      </div>
    </div>
  </div>
</template>

<script>
import UserHeader from "@/components/UserHeader";
import UserList from "@/components/UserList";
import UserFooter from "@/components/UserFooter";

export default {
  name: 'App',
  components: {
    UserHeader,
    UserList,
    UserFooter
  },
  data() {
    return {
      todos: [
        {id: '001', name: '抽烟', completed: false},
        {id: '002', name: '喝酒', completed: false},
        {id: '003', name: '烫头', completed: false}
      ],
      todosNew: [],
      completedTodos: []
    }
  },
  methods: {
    //接收Header子组件传过来的对象
    receive(e) {
      /*console.log('App组件收到了来自Header组件的事件:',e)*/
      this.todos.unshift(e) //将收到的事件对象加入到todos
    },
    //改变todo的completed
    checkTodo(id) {
      this.todos.forEach((todo) => {
        if (todo.id === id) todo.completed = !todo.completed
      })
    },
    //删除todo
    deleteTodo(id) {
      this.todosNew = this.todos.filter((todo) => {
        return todo.id !== id;//将id不是传过来的id的todo过滤出来
      })
      this.todos = this.todosNew
    },
    //全选/取消全选
    checkAllTodo(isAll) {
      this.todos.forEach((todo) => {
        todo.completed = isAll
      })
    },
    //清除所有已完成任务
    clearCompletedTodo() {
      this.completedTodos = this.todos.filter((todo) => {
            return !todo.completed
          }
      )
      this.todos = this.completedTodos
    }
  }
}
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}

.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
